DE102006022368A1 - A method and apparatus for establishing a table with communication participants, method and apparatus for determining at least one communication participant, methods for signaling that a communication connection was undesirable for a called party, communication device and computer program elements - Google Patents

Abstract

In a method for establishing a table with communication subscribers who have been indicated that they have requested at least one voice communication connection undesirable for at least one other communication subscriber, a message is received in which information is contained which indicates that a communication link between a caller-communication subscriber and a called-up communication subscriber for the called-up communication subscriber was undesirable, as well as a caller-identification indication by means of which the caller-communication subscriber is identified. The caller communication subscriber is nonspecifically entered into a table with regard to the called communication subscriber or, if the caller communication subscriber is already enlisted in the table, a value indicating the frequency of calling the caller communication subscriber is increased or decreased.

Description

The This invention relates to a method and apparatus for building a table with communication participants, a method and a Device for determining at least one communication subscriber, a method of signaling that a communication link for one Called communication participants was undesirable, a communication device and computer program elements.

at modern communication systems in which the billing mode often by means of a so-called flat rate, in other words, by means of a flat fee, is regulated, it comes more frequently that automated, computerized phone calls for a large number generated by communication participants, with which the called Communication participant harassed become.

This Problem aggravated with the advent of so-called Internet telephony, i. a voice communication using internet protocols. In analogy to so-called SPAM emails will this annoyance of telephone communication network participants also referred to as SPAM over IP telephony (SPIT). In other words, called SPIT unwanted calls in a Voice over IP based communication.

Around To reduce the problem of SPIT calls, it is customary to date, subscriber-specific Lists, called blacklists, also referred to as blacklists, in which caller identification information, for example Phone numbers, stored by such communication participants from which the respective end-user does not answer a call would like to.

• a) Der angerufene Teilnehmer (User) trägt die Identifikation des Anrufers (beispielsweise dessen Rufnummer) in seine persönliche Blacklist ein. Üblicherweise erfolgt dies mittels einer Web-Schnittstelle. Ein Nachteil dieser Vorgehensweise ist in dem hohen Aufwand für den Teilnehmer zu sehen, da beispielsweise das Medium „World Wide Web" nicht unbedingt immer verfügbar beziehungsweise aktiv ist. Ferner ist es problematisch, wenn die Rufnummer des Anrufers nach Rufende, d.h. nach Beendigung der Kommunikationsverbindung, nicht mehr bei dem angerufenen Kommunikationsteilnehmer (im Folgenden auch bezeichnet als Angerufener-Kommunikationsteilnehmer) verfügbar ist, da es beispielsweise sein kann, dass in einem Kommunikationsendgerät keine Anrufliste für erfolgreich aufgebaute und abgeschlossene Kommunikationsverbindungen (erfolgreiche Anrufe) geführt wird. Weiterhin ist diese Vorgehensweise nicht möglich, wenn die Rufnummer des Anrufers nicht zu dem Angerufener-Kommunikationsteilnehmer übertragen wurde, beispielsweise in dem Fall, dass der Anrufer-Kommunikationsteilnehmer die Anzeige seiner Rufnummer bei dem Angerufener-Kommunikationsteilnehmer unterdrückt hat.
• b) Bei dem Kommunikationsdienst-Provider wird der neue Blacklist-Eintrag in einer Datenbasis gespeichert. Diese mögliche Vorgehensweise hat beispielsweise folgende Nachteile. Üblicherweise ist der Umfang der teilnehmerspezifischen Blacklisten sehr begrenzt, beispielsweise auf 32 Einträge pro Teilnehmer, da das Datenvolumen für alle Teilnehmer (beispielsweise 100.000) sonst zu groß wird. Bei einem seltenen Auftreten von SPIT-Anrufern besteht ferner die Gefahr, dass der Teilnehmer seine Blacklist-Einträge kaum pflegt, d.h. sie verbleiben auf unbestimmte Zeit in der teilnehmerspezifischen Blackliste, anders ausgedrückt, es erfolgt keine „Alterung" der in der Blackliste gespeicherten Daten. Dies ist bedenklich, falls Rufnummern nach einer gewissen Zeit neu vergeben werden. Ferner wäre bei dieser Vorgehensweise bei gehäuftem Auftreten von SPIT-Anrufern der Angerufener-Kommunikationsteilnehmer gezwungen, seine teilnehmerspezifische Blackliste kontinuierlich zu pflegen. Es besteht in diesem Fall die Gefahr, dass er diese Pflege aus verwaltungstechnischen Gründen aufgibt.
• c) Da die einzelnen Blacklisten als teilnehmerspezifische Blacklisten existieren, muss der Kommunikationsdienst-Provider eine algorithmische Kombination aller Blacklisten vornehmen, um einen allgemeinen Schutz für alle Kommunikationsteilnehmer wirksam erreichen zu können. Diese Vorgehensweise weist beispielsweise den Nachteil auf, dass die Auswertung der Vielzahl von teilnehmerspezifischen Blacklisten durch den Kommunikationsdienst-Provider aus Aufwandsgründen (anders ausgedrückt aufgrund der erheblichen Rechenzeit, die zur Durchführung dieser Vorgehensweise erforderlich wäre) nur in gewissen Zeitabständen möglich beziehungsweise vorgesehen ist. Aus diesem Grund ist eine zeitnahe SPIT-Abwehr auf diese Weise nur schlecht, wenn überhaupt, zu gewährleisten.

The technical realization of such a subscriber-specific blacklist can be done in one of the following ways:

• a) The called subscriber (user) enters the identification of the caller (for example, his number) in his personal blacklist. This is usually done by means of a web interface. A disadvantage of this procedure is to be seen in the high expense for the subscriber, since, for example, the medium "World Wide Web" is not necessarily always available or active.Furthermore, it is problematic if the phone number of the caller after the call ends, ie after completion of the communication connection , is no longer available at the called communication subscriber (hereafter also referred to as called-up communication subscriber), as it may, for example, be that a caller list for successfully established and terminated communication connections (successful calls) is not kept in a communication terminal possible if the calling number of the caller has not been transmitted to the called party, for example in the event that the caller party has suppressed the display of his number at the called party.
• b) The communication service provider stores the new blacklist entry in a database. This possible approach has, for example, the following disadvantages. Usually, the scope of the subscriber-specific blacklists is very limited, for example to 32 entries per subscriber, since the data volume for all subscribers (for example 100,000) will otherwise become too large. In the rare occurrence of SPIT callers there is also a risk that the subscriber barely maintains his blacklist entries, ie they remain indefinitely in the subscriber-specific blacklist, in other words, there is no "aging" of the data stored in the blacklist. This is a concern if phone numbers are re-assigned after a certain period of time, and if SPIT callers frequently encounter this, then the called party would be forced to maintain their subscriber-specific blacklist continuously, in which case they run the risk Gives up care for administrative reasons.
• c) Since the individual blacklists exist as subscriber-specific blacklists, the communication service provider must make an algorithmic combination of all blacklists in order to effectively achieve general protection for all communication users. This procedure has, for example, the disadvantage that the evaluation of the plurality of subscriber-specific blacklists by the communications service provider for reasons of cost (in other words, due to the considerable amount of computing time that would be required to carry out this procedure) is possible or provided only at certain time intervals. For this reason, a timely SPIT defense in this way is poor, if anything, to ensure.

The following document was published for SPIT treatment:
S. Niccolini et al., Requirements and Methods for SPIT Identification Using Feedbacks in SIP, SIPPING Working Group, Internet-draft, draft-niccolini-sipping-feedback-spit-00, February 2006, describes a method by which a participant, which receives a SPIT call, reported to the SPIT identification system about it. According to this document, be wrote that this report is done using SIP messages, for example, using a Session Initiation Protocol NOTIFY (SIP NOTIFY) message or by means of additional information, which refers to the receipt of a SPIT call, this information in a Header field of a SIP BYE message is inserted.

Of the Invention is based on the problem information about callers of unwanted voice communications to determine in a simple manner or the necessary for this Data in a simple and cost-effective way provide.

The Problem is solved by a method and apparatus for building a table of communication participants, by a method and a device for determining at least one communication subscriber, by a method of signaling that a communication link for one Called-communication subscriber was undesirable, by a communication device as well as by appropriate computer program elements with the features solved according to the independent claims.

• • eine Information mittels der angegeben ist, dass eine Kommunikationsverbindung zwischen einem Anrufer-Kommunikationsteilnehmer und einem Angerufener-Kommunikationsteilnehmer für den Angerufener-Kommunikationsteilnehmer unerwünscht war,
• • eine Anrufer-Identifikationsangabe, mittels welcher der Anrufer-Kommunikationsteilnehmer identifiziert wird.

In a method for computer-aided building of a table with communication subscribers who have been stated to have requested at least one voice communication connection undesirable for at least one other communication subscriber, a message is received, which contains:

• Information is indicated by means of which a communication connection between a caller communication subscriber and a called communication subscriber was undesirable for the called communication subscriber,
• A caller identification information by means of which the caller communication subscriber is identified.

Of the Caller communication subscriber is referred to the called communication subscriber unspecifically entered in a table or, if the caller ID subscriber already entered in the table, becomes a value with which the frequency the name of the caller communication subscriber is specified, elevated or humiliated.

• • eine Information, mittels der angegeben ist, dass eine Kommunikationsverbindung zwischen einem Anrufer-Kommunikationsteilnehmer und einem Angerufener-Kommunikationsteilnehmer für den Angerufener-Kommunikationsteilnehmer unerwünscht war,
• • eine Anrufer-Identifikationsangabe, mittels welcher der Anrufer-Kommunikationsteilnehmer identifiziert wird.

An apparatus for establishing a table with communication parties that has been stated to have requested at least one voice communication connection that is undesirable for at least one other communication user has a receiver for receiving a message, which contains:

• An information indicating that a communication connection between a caller communication subscriber and a called communication subscriber was undesirable for the called communication subscriber,
• A caller identification information by means of which the caller communication subscriber is identified.

Farther a table management unit is provided, which is set up in this way is that they are the caller-communicator unspecified with respect to the called party enters in a table or, if the caller-communicator is already in the table is entered, a value with which the frequency of naming the caller communication subscriber is increased or humiliated.

According to one another embodiment of the The invention is a method for computer-aided determination at least a communication subscriber, for whom it is assumed that he at least one for at least one other communication subscriber unwanted voice communication connection has requested. For at least one in a table, in the communication participant, the caller on a communication link between a caller communication subscriber and a called party were, which for the called communication party undesirable was unspecific, in terms of the called communication party are registered, registered communication participant is checked whether this meets a predetermined criterion. In the case, that the registered communication subscriber the predetermined criterion enough, the communication participant is accepted as a communication participant, the at least one for requested at least one other communication subscriber unwanted voice-communication connection Has.

According to another embodiment of the invention, a device for determining at least one communication subscriber is provided, for which it is assumed that he has requested at least one for at least one other communication subscriber undesirable voice communication connection. The apparatus according to this embodiment of the invention comprises a checking unit arranged to check for at least one in a table in which communication parties who were callers at a communication connection between a caller communication subscriber and a called party communication subscriber who is in charge of the call ner communication subscriber was undesirable, unspecific registered with regard to the called party communication subscriber, registered communication participants, whether this meets a predetermined criterion. Furthermore, a determination unit is provided, which is set up in such a way that, in the event that the registered communication user satisfies the specifiable criterion, he determines the communication participant as a communication participant who has requested at least one voice-communication connection that is undesirable for at least one other communication participant.

For example by the called party unspecific save one Caller identification and related information that the associated Caller as a caller in one for each called party undesirable Communication link is a very simple and central Data management and data evaluation, for example statistical data evaluation, allows. This is also a very simple determination of communication participants, which often as a caller one for the respectively called unwanted Communication connection called, allows. It is no longer necessary For example, called party-specific tables, for example Participant-specific blacklists, to lead and this separately or very complex to evaluate combined with each other. This central Data storage in just one central table also allows a very fast Reaction to a changing Communication environment or communication situation, i.e. For example, a very quick reaction to short-term newly occurring callers, which in a short time interval very often as a caller of an undesirable Be called communication connection.

According to one another embodiment of the The invention is a method of signaling that a communication link for one Called-communication participant was undesirable, provided, where from the called communication party a code is entered into a communication device by means of that the receiver the message is given that a communication connection between a caller communication party and the called communication party for the Called communication participants undesirable was. According to this Method, a message is generated containing the code and a caller identification, by means of which the caller communication subscriber is identified contains. The message is sent to an evaluation unit.

A Communication device has an input unit for inputting of a code by which the recipient of the message indicated is that a communication link between a caller communication subscriber and the caller communication party for the called communication party undesirable was. Further, a message generation unit for generating a message containing the code and a caller identification, by means of which the caller communication subscriber is identified contains. Furthermore, a transmitter is provided for sending the message an evaluation unit.

The The evaluation unit can use this code, which they detected, for example, from the received message, that this message should indicate that it is in this communication connection, one for the called party undesirable Communication link has acted and can thus in the Detect message also contained caller identification and in for example, a table described above or otherwise processed.

at This procedure does not require the communication device itself to change, as for example according to the above S. Niccolini et al., Requirements and Methods for SPIT Identification Using Feedback in SIP, required would.

Farther are provided computer program elements which when executed the same by means of a computer, the method steps described above exhibit.

It It should be noted that the invention is in software, i. by means of one or a plurality of appropriately configured computer programs, in hardware, i. by means of one or more appropriately arranged special electronic circuits, or in any hybrid Form, i. implemented in arbitrary parts in hardware or software can be.

exemplary Embodiments of the invention will become apparent from the dependent claims.

The The embodiments described below relate, where appropriate, both the method and apparatus for building a table with Communication participants, the method and the device for Determining at least one communication participant, the procedure to signal that a communication link for a Called-communication participant was undesirable, the communication device and the computer program elements.

The Message may be as one of the at least one other communication participant received message. In other words, according to this Embodiment of the invention, the other communication participants has the Message generated and sent to the receiver, which, for example a central evaluation unit of the communication service provider is transmitted.

The Message is sent according to a embodiment the invention according to a Communication link control protocol transmitted, wherein For example, both the respective protocol steps as well the message format according to this Communication link control protocol are designed. As a communication connection control protocol The Session Initiation Protocol (SIP) can be used.

On this way will be a very simple mechanism for controlling a Communication link used to transmit the information that a communication connection for the called party undesirable was to a central unit, for example the communication service provider, alternatively to a separate communication service provider external Unit, which to monitor and manage unwanted communication links is provided.

According to one embodiment of the invention, it is provided to use the SUBSCRIBE / NOTIFY mechanism provided in accordance with SIP in such a way that the message is a Session Initiation Protocol NOTIFY message which is transmitted to the respective recipient, the recipient of the message having previously been to this Communications Service has subscribed through a Session Initiation Protocol SUBSCRIBE message. (This is in 1 with message 108 described)

The Information can in the message itself, but alternatively also in an additional message field, for example in an additional Message field of a SIP BYE message, For example, in the header, be made in the additional Message field containing the information specified by the is that a communication link between a caller communication subscriber and a called party for the Called communication participants was undesirable.

In An alternative embodiment of the invention is provided that in the message a in the communication device of the called party communication subscriber entered code becomes, by means of which the receiver the message is given that a communication connection between a caller communication subscriber and a called communication subscriber for the Called communication participants undesirable was.

On this way will be a very simple signaling of this information to the recipient allows without it being necessary, the respective transmission protocol or else to change the communication device of the called communication subscriber. It is only necessary, a corresponding evaluation unit at the recipient to provide the message which is established, the respective one Recognize code and deduce that this message is a for the Called unwanted Communication connection referenced.

According to one In another embodiment of the invention, it is provided that messages be received by different communication participants, wherein each message contains information is, by means of which it is stated that a communication link between a caller communication subscriber and a called communication subscriber for the called communication subscriber undesirable was as well as a caller identification, by means of which the caller communication subscriber is identified. In this way, a very simple centralized Managing information regarding a variety of each called Communication participants undesirable Enables communication links, what a very reliable, inexpensive and easy monitoring of callers regarding requesting undesirable for the callee Communication links allows.

According to one Development of the invention, it is provided, at least one additional To use criterion to determine if it is the communication party is a communication participant who has at least one for at least another communication subscriber unwanted voice communication connection has requested.

• • Dauer einer oder mehrerer Kommunikationsverbindungen, bei denen ein jeweiliger Kommunikationsteilnehmer der Anrufer-Kommunikationsteilnehmer war,
• • Information über das Verhalten des Kommunikationsteilnehmers als Anrufer-Kommunikationsteilnehmer,
• • Information über das Verhalten des Anrufer-Kommunikationsteilnehmers gegenüber einem oder mehreren Kommunikationsdienst-Providern.

At least one of the following additional criteria can be used for this:

• • duration of one or more communication connections in which a respective communication subscriber was the caller communication subscriber,
• Information about the behavior of the communication subscriber as caller communication subscriber,
• • Information about the behavior of the caller communication participant towards ei one or more communication service providers.

clear can thus as an additional criterion are used characteristics of each built and as undesirable declared communication connection or generally the behavior of the caller communication subscriber, for example the frequency of established communication links or even the times to which the communication links are usually established, the frequency and the number of simultaneously established communication links, Etc.

Farther may also have information about it used as the caller-communicator across from the communication service provider behaves, such as its payment behavior, the frequency of changing his residence, etc.

Out These criteria can be an improved assessment of each communication participant To do this, whether it is a "normal" communication participants or um a communication participant who is more likely to have a Called unwanted Establishes communication links.

When Voice communication connection may be a packet-switched voice communication connection be used, but alternatively also a circuit-switched Voice communication link.

The For example, invention may be advantageous in any communication system be used in which building a large number of communication links for the caller does not cause a significant increase in costs, what for example in a communication system respectively in a billing mode, the case is the flat rate for a given period for any number of communication links a predetermined fee is billed or billed, for example according to a so-called flat rate.

Consequently the invention is particularly suitable for use in voice communication links, which are Internet-based, given such a form of Internet-based voice communication a flatrate very common is. Thus, as a voice-communication connection, a voice over Internet Protocol voice communication connection (Voice over IP, VoIP) used become.

In an embodiment of the method for signaling that a Communication connection for a called party was undesirable, it is envisaged that the message by means of a telecommunications network is sent to an evaluation unit.

embodiments The invention are illustrated in the figures and will be explained in more detail below.

It demonstrate

1 a first message flow diagram illustrating the message exchange according to a first embodiment of the invention;

2 a second message flow diagram in which the message flow is shown according to a second embodiment of the invention;

3 a flowchart in which a method for establishing and managing a SIP table according to an embodiment of the invention is shown;

4 a flowchart in which the method steps for determining a spitter subscriber according to an embodiment of the invention are shown.

In The figures are, as far as appropriate, for identical or similar Elements or method steps used identical reference numerals.

As in a first message flow diagram 100 represented (cf. 1 ), a communication system has a first communication device 101 , For example, a first communication terminal, a second communication device 102 , For example, a second communication terminal, and a communication service provider computer 103 on.

The communication service provider computer 103 may be a computer or a plurality of computers, as well as one or more database tables or even contain one or more databases. Likewise, it can be computers of several communication service providers.

The communication service provider computer 103 is arranged to provide one or more communication links between any number of communication participants, in other words between any number of communication devices 101 . 102 ,

The first communication device 101 and the second communication device 102 are in each case by means of a corresponding partial communication connection with the communication service provider computer 103 connected. The first communication device 101 and the second communication device 102 can be any communication terminal, such as a landline telephone, a cellular telephone, a personal digital assistant (PDA) with a corresponding communication device, a notebook, a laptop or a personal computer or another type of computer, in which a corresponding communication device is included.

The communication devices 101 . 102 are arranged according to this embodiment of the invention for communication according to ei nem Voice over Internet Protocol (Voice over IP, VoIP) communication standard and thus have each implemented a corresponding Internet protocol stack including a unit for providing the Internet Protocol (IP) and the Transport Control Protocols (TCP) and / or User Datagram Protocols (UDP) and other desired communication protocols in other communication layers.

It should be noted that in alternative embodiments of the invention, any other communication network or any other suitable communication standard can be used for communication between the communication devices 101 . 102 as well as the communication service provider computer 103 ,

Thus, the invention is not limited to any particular communication protocol or technology, but is particularly suitable for use in the field of Internet-based voice communication. The communication devices 101 . 102 can by means of fixed network communication links or mobile communication links with the communication service provider computer 103 be coupled.

1 shows the message exchange between the communication devices 101 . 102 as well as the communication service provider computer 103 according to a first embodiment of the invention in a first message flow diagram 100 ,

According to the first embodiment of the invention, the first communication device 101 for VoIP registration a first SIP REGISTER message 104 generated and sent to the communication service provider computer 103 transmitted. Upon receipt of the first SIP REGISTER message 104 generates the communication service provider computer 103 a first SIP 200 OK message 105 and transmits this as confirmation of the registration of the first Kommunikationsseinrich device 101 for the communication service VoIP to the first communication device 101 ,

Furthermore, the second communication device generates 102 a second SIP REGISTER message 106 and also transmits them to the communication service provider computer 103 to register with this for the communication service VoIP.

Upon receipt of the second SIP REGISTER message 106 generates the communication service provider computer 103 a second SIP 200 OK message 107 and transmits them to the second communication device 102 In order to confirm this also its registration for the respective communication service, according to this embodiment of the invention for the communication service VoIP.

Furthermore, the communication service provider computer generates 103 a SIP SUBSCRIBE SPIT message 108 and also transmits these to the second communication device 102 , With the SIP SUBSCRIBE SPIT message 108 subscribes to the communication service provider computer 103 at the second communication device 102 for the communication service of the SPIT voting (in other words for the SPIT tuning communication service), in other words, for the communication service that the second communication device 102 Upon receipt of an unwanted call, the calling communication subscriber can identify as SPIT communication subscriber (SPAM over IP telephony) and this information, as will be described in more detail below, according to the SUBSCRIBE-NOTIFY mechanism according to SIP to the communication service provider computer 103 can transmit.

Upon receipt of the SIP SUBSCRIBE SPIT message 108 activates the second communication device 102 according to the required functions, for example, has a button of the second communication device 102 the voting functionality as part of the SPIT voting and generates a third SIP 200 OK message 109 with which subscribing to the communication service SPIT voting is confirmed and sends it to the communication service provider computer 103 ,

In the following it is assumed without restriction of generality that now the first communication device 101 a voice communication connection with the second communication tion device 102 or want to build with their users. To accomplish this, generate the first communication message 101 a first SIP INVITE message 110 and sends them to the communication service provider computer 103 which is to receive the first SIP INVITE message 110 a second SIP INVITE message 111 generated and this to the second communication device 102 transmitted to the second communication device 102 to the requested voice communication connection with the first communication device 101 invite.

It should be noted that the case described here represents a so-called proxy method in which the complete signaling communication via the communication service provider computer 103 expires.

In an alternative embodiment of the invention, a so-called redirect method is provided in which the communication service provider computer 103 only used for registration and address resolution. The signaling structure for communication relationships would then run directly between the two communication partners. But the general procedure for the SPIT Notification would not change.

Will the user of the second communication device 102 In other words, accepting the call to the voice communication link, the second communication device generates 102 on a corresponding input by the user towards a fourth SIP 200 OK message 112 and sends them to the communication service provider computer 103 , This generates the reception of the fourth SIP-200-OK message 112 a fifth SIP 200-0K message 113 and transmits them to the first communication device 101 , whereby after receiving the fifth SIP-200-OK message 113 a voice communication connection between the first communication device 101 and the second communication device 102 by means of the communication service provider computer 103 is constructed and switched through.

According to this exemplary embodiment of the invention, the realtime transport protocol (RTP) is used to transmit the voice data. In other words, this means that in the switched-through voice communication link now an exchange of media data, such as voice data, is enabled (in 1 represented by a block 114 ).

After the communication connection has been established, according to this embodiment of the invention, it is assumed that the part of the first communication device 101 a SPIT voice file is played and the corresponding voice data to the second communication device 102 be transmitted.

Upon receipt of this voice data, the user recognizes the second communication device 102 in that the call is not a standard telephone call with a natural person as the communication partner, but that it is an unwanted, usually automated, SPIT telephone call. It should be noted that the unwanted call can also come from a natural person. The user then evaluates the second communication device 102 , also referred to hereinafter as client B, the established communication connection as a SPIT communication connection and generates a corresponding SPIT notification message (step 115 ).

This is done using the SUBSCRIBE NOTIFY mechanism provided by SIP.

Thus, it becomes a first SIP NOTIFY SPIT message 116 generated and sent to the communication service provider computer 103 which receives upon receipt of this first SIP NOTIFY SPIT message 116 out a sixth SIP 200 OK message 117 and confirms receipt of the first SIP NOTIFY-SPIT message 116 to the second communication device 102 transmitted.

In the first SIP NOTIFY-SPIT message 116 is both a communication session identification information with which the respective communication connection or communication session is identified, and an indication that it is the first SIP NOTIFY SPIT message 116 is an SPIT communication connection as well as the identification by which it is possible for the caller of the communication connection, ie according to this embodiment of the invention, the first communication device 101 , to identify. The identification indication may be in addition to the communication session identification information in the first SIP NOTIFY SPIT message 116 be included. Alternatively, however, on the part of the communication service provider computer 103 the communication session identification information is used as the caller identification information by using the communication session identification information (session ID) of the associated caller which is stored in the communication service provider computer 103 as part of the establishment of the communication connection has been determined.

Thus, due to the receipt of the first SIP NOTIFY-SPIT message 116 the communications service provider computer 103 now the calling client A, in other words the first communication device 101 , assign a SPIT value, which first communication device 101 with the client B, ie, the second communication device 102 , has established a SPIT communication connection (in 1 symbolized by a block 118 ).

According to this embodiment of the invention, the notification of the communication service provider computer thus takes place 103 while still the communication connection between the first communication device 101 and the second communication device 102 is constructed.

The possible procedural steps in the communication service provider computer 103 will be described below with reference to 3 explained.

In addition, it is assumed that according to this embodiment, the user of the second communication device 102 would like to abort the communication connection and on an appropriate input of the user thus generates the second communication device 102 a first SIP BYE message 119 and sends them to the communication service provider computer 103 which is to receive the first SIP BYE message 119 out a second SIP-BYE message 120 generated and this to the first communication device 101 transmitted.

After receiving the second SIP BYE message 120 generates the first communication device 101 a seventh SIP 200 OK message 121 and transmits them to the communication service provider computer 103 to inform them about the successful removal of the communication link. Upon receipt of the seventh SIP-200 OK message 121 The communications service provider computer generates this 103 an eighth SIP 200 OK message 122 and transmits them to the second communication device 102 to inform them about the successful removal of the communication link.

Now the communication connection is broken down.

2 shows in a second message flow diagram 200 the message flow for a SPIT voting according to a second embodiment of the invention.

Since the method steps for establishing the communication connection and the thus enabled exchange of media data using RTP (Block 114 ) is identical to the method according to the first embodiment of the invention, as shown in FIG 1 is illustrated and explained above, is dispensed with a repeated description of these method steps.

However, according to this embodiment of the invention, it is assumed that prior to the issuing of the SPIT voting by the user of the second communication device 102 the communication link from the second communication device 102 In other words, the SPIT voting is done according to this embodiment of the invention after the termination of the voice communication connection.

It should be pointed out that, according to an alternative embodiment of the invention, it may be provided that the SPIT voting is initiated by the second communication device even before a requested or requested communication connection is established 102 can be performed and may not even build up the communication connection, when the user of the second communication device already recognizes when requesting the communication connection that the caller communication participant is a SPIT caller. In another alternative, however, it is also provided to establish the communication connection after the successful SPIT voting, to listen to the corresponding message and then terminate the communication connection again.

According to this exemplary embodiment of the invention, it is thus provided for terminating the communication connection on the part of the second communication device 102 a third SIP BYE message 201 to generate and send this to the communication service provider computer 103 to convey. The communication service provider computer 103 generated upon receipt of the third SIP BYE message 201 towards a fourth SIP-BYE message 202 and transmits them to the first communication device 101 for breaking down the communication connection.

Receiving the fourth SIP BYE message 202 confirms the first communication device 101 by sending a ninth SIP OK message 203 and generates this to the communication service provider computer 103 transmitted, which on the receipt of this message out a tenth SIP OK message 204 generated and this to the second communication device 102 transmitted.

After terminating the communication connection with the first communication device 101 the user recognizes and evaluates the second communication device 102 the terminated call or the terminated voice communication connection with the first communication device 101 as a SPIT communication connection and sends a corresponding SPIT notification to the communication service provider computer 103 (Step 205 ). This is done according to this embodiment of the invention by the second communication device 102 to a corresponding input by the user of the second communication device 102 towards, for example, by a corresponding keystroke of the user of the second communication device 102 a second SIP NOTIFY-SPIT message 206 and generates this to the communication service provider computer 103 transmitted. The key can be implemented as a mechanical key or as a selectable key of a graphical user interface of a computer, ie implemented in software. The communication service provider computer 103 acknowledged receipt of the second SIP NOTIFY-SPIT message 206 towards this the second communication device 102 by the communications service provider computer 103 an eleventh SIP 200 OK message 207 generated and this to the second communication device 102 transmitted.

Due to receiving the second SIP NOTIFY SPIT message 206 , which has the same structure as that described in the first embodiment, the communication service provider computer 103 now a SPIT value to the calling client A, ie the first communication device 101 , associating a voice communication connection with the client B, ie with the second communication device 102 , built up.

According to both As described above, it should be noted that an already provided in accordance with SIP Mechanism is used, namely the SUBSCRIBE NOTIFY mechanism, which is why a change the communication protocol is not required in this case.

In an alternative embodiment of the invention, it may be provided that the corresponding information in the context of SPIT voting, ie the information that the user of the second communication device 102 the voice communication connection is evaluated as SPIT communication connection, in another message or by means of another protocol to the communication service provider computer 103 to convey. This can be done, for example, in the header field of a SIP BYE message.

It should also be pointed out that the execution of the evaluation and the table management of SPIT communication subscribers described below does not necessarily have to be performed by the communication service provider, but can also be provided by another trustworthy entity, in which case the communication not necessarily with the communication service provider computer 103 but would be done with a correspondingly authorized computer.

When Alternative may be the information, for example, if any, using the Binary Floor Control Protocol (BFCP), the Media Gateway Control Protocols (MGCP) or Skype Protocols respectively.

The following is in a first flowchart 300 in 3 A method for managing a table is described in which the communication participants are entered, which communication participants have been designated by one or more called communication parties (also referred to as called-communication participants) as SPIT communication participants.

The method according to these embodiments of the invention in the communication service provider computer 103 executed.

After starting the procedure (step 301 ) continuously checks whether a message has been received (step 302 ).

If this is not the case ("No" in step 302 ), so at regular intervals, for example within a few milliseconds, the test step 302 repeatedly performed.

Once a message has been received ("Yes" in step 302 ), it is checked whether the received message is a SPIT reconciliation message, for example a SIP NOTIFY SPIT message 116 . 206 (test step 303 ).

If this is not the case ("No" in test step 303 ), the method becomes in the test step 302 continues and checks whether another message has been received. The received message itself is discarded with regard to the table management as described in this connection.

However, if the received message is a SPIT reconciliation message, for example a SIP NOTIFY SPIT message 116 . 206 ("Yes" in test step 303 ), so will from the received message determines the caller identification information, ie, for example, the number of the caller communication subscriber (step 304 ).

In a subsequent test step, it is checked whether the caller ID is already contained in a previously initialized SPIT table (test step 305 ).

If this is not the case ("No" in test step 305 ), a table record is created for the caller with the corresponding caller identification information, ie for the caller with the telephone number specified in the SPIT message (step 306 ) and a frequency value for the caller communication subscriber is set to a predetermined initialization value (step 307 ).

Of the Initialization value can basically be be any value. For the case that is provided, the frequency value on renewed Increase occurrence, as it will be even closer explained For example, the initialization value may be null. In case that the frequency value upon renewed mention of the caller communication subscriber As SPIT caller is to be lowered, the initialization value a value greater than "zero", for example a predetermined initialization value M (with M> 0).

Subsequently, the procedure in step 302 as described above, it is checked whether a message has been received.

However, in step 305 Determines that the identified caller communication subscriber is already included in the SPIT table ("Yes" in check step) 305 ), the frequency value specified in the table for the current caller communication subscriber is increased or decreased by a predetermined value, for example by the value "one".

Subsequently, the method is again in test step 302 continued.

4 shows in a second flowchart 400 a method also performed in the communication service provider computer 103 , which is provided for processing the SPIT table, in which a records each containing a table index, also referred to as identification index (ID Index), are included. The method steps described are carried out for each named caller communication subscriber who has been evaluated as an SPIT communication subscriber and is stored in the table.

Further is in each table data record the respective caller identification contain and a frequency value, with which the frequency the naming of the respective caller communication subscriber as a SPIT communication subscriber is specified.

After starting the procedure (step 401 ), an identification index i for respectively identifying a table data record is set to a predetermined initialization value, for example to the value "one" (step 402 ).

It is subsequently checked whether the caller communication subscriber identified with the identification index i fulfills a predetermined criterion according to the SPIT table, wherein according to an embodiment of the invention the predetermined criterion is a threshold indicating a maximum tolerable name of the communication subscriber as SPIT communication subscriber (test step 403 ).

If the criterion is met, ie the threshold value is exceeded (for example, if the frequency of the communication subscriber is increased as SPIT communication subscriber) or if the frequency value for each communication subscriber is decreased as SPIT communication subscriber ("Yes" in check step) 403 ), the respective communication user is marked as a spitter communication user (step 405 ) and the method is in a further test step 404 in which it is checked whether all communication participants stored in the table have already been checked.

Is in the test step 403 However, for the tested communication participant the criterion is not fulfilled ("No" in test step 403 ), the method immediately becomes a test step 404 continued.

Is according to the test step 404 determines that not all participants entered in the table have been checked for the criterion ("No" in the test step) 404 ), the communication subscriber identification index i is increased by a predefinable value, for example by the value "one" (step 406 ) and the procedure will be in step 403 for the next communication subscriber occurring in the table, designated with the new communication subscriber index i.

However, all communication subscribers entered in the table have already been checked ("Yes" in check step) 404 ), in a further test step (test step 407 ) checks whether the procedure should be ended.

If this is not the case ("No" in test step 407 ), then the procedure in step 402 in which the communication subscriber index i is again set to the predetermined initialization value, for example the value "one", in other words, the communication subscribers in the table are checked again, starting at the beginning of the table.

However, the procedure should be terminated ("Yes" in test step 407 ), the procedure is terminated (step 408 ).

It It should be noted that in alternative embodiments the invention an arbitrarily complex criterion for determining whether the respective communication participant is a spitter communication participant can be used.

So For example, a time window function can also be provided, i.e. In this case, a communication participant entered in the table is if he is for a predetermined period of time from another communication participant not been named as a spitter-communicator, again removed from the table. Also, depending on the time, the frequency value elevated or be humiliated if for this time each of the communication participants from a called party communication has not been named as a spitter communication participant.

In another embodiment of the invention, it is provided that the SPIT identification signaled in the above manner or in a manner described below on the part of a communication terminal, for example the second communication device 102 can be used as one of several criteria for determining spitter communication participants.

Thus, for example, the table or the respective communication user-specific entries (in this case it should be pointed out that these are only communication user-specific values and entries that specify the respective caller of the communication connection, but not the called communication user) other characteristics which characterize the respective caller communication subscriber, for example with information indicating the duration of the established communication connections, that of the first communication device 101 or whose communication subscriber is requested, alternatively describing the behavior of the communication subscriber, for example information about how often the communication subscriber requests communication connections and how frequently parallel, ie at the same time, communication connections are established.

Farther can be as additional Information the behavior of the communication participant towards the Communication service providers or opposite another communication service provider, for example an information about whether the communication participant reliably settles invoices or whether he often changes his residence.

Farther can be as additional Considered criterion on how many subscriber-specific blacklists the respective communication participant, if any, is listed.

In the following, alternative embodiments for signaling a SPIT naming of a caller communication subscriber by a called party will be presented. The following alternative embodiments all have the advantage that they also without changing the communication terminal, ie, for example, the second communication device 102 to get along. Thus, when implementing such an approach, the communication standard used in each case does not have to be taken into consideration, which makes a very cost-effective realization of this mechanism possible even with changed communication standards.

Illustratively, it is common to the following exemplary embodiments that a predetermined code is provided by the user of the second communication device 102 is entered in the same. This code or a size uniquely derived therefrom is inserted in a signaling message according to the respective communication protocol and this information becomes the communication service provider computer 103 which searches the message for the code or for a variable derived from this code (for example, in a clear or unambiguous manner) upon receipt of the signaling message. If this code or this variable is included in the signaling message, the communication service provider computer recognizes 103 in that this message is a SPIT reconciliation message and it carries the above related to 3 described method steps.

According to one embodiment of the invention, it is provided, before accepting the communication connection, a so-called call deflection to a predetermined by example, the communication service provider pseudo-number ("* 12" or the like) (for example, by means of a SIP message "302 MOVED TEMPORARYLY") to transmit. The communication service provider computer 103 detects the corresponding call number of the caller communication subscriber, ie the telephone number of the first communication device 101 and leads that in 3 described method.

According to another embodiment of the invention, it is provided, during a established communication connection, a call transfer (call transfer) from the second communication device 102 to a specified by the communication service provider pseudo-number ("* 12" or the like) (for example by means of a SIP message "REFER") perform. The communication service provider computer 103 Also in this case, the phone number of the first communication device is detected 101 and performs the described method for entering the named communication subscriber into the SPIT table or increasing or decreasing the respective frequency value in the SPIT table for the respective communication subscriber.

According to an alternative embodiment of the invention, a SPIT naming is provided after termination of the communication connection. In this case, a direct call is made by the second communication device 102 to a pseudo-number ("* 12" or the like) given by the communication service provider (for example, using a SIP message "INVITE"). The communication service provider computer 103 detects the telephone number from the client A, ie from the first communication device 101 , using the data of the last stored call to the second communication device 102 (Client B) analogous to a so-called Automatic Recall or a so-called Malicious Call Trace and performs the entry of the respective subscriber in the SPIT table or increasing or decreasing the frequency value for the caller communication subscriber in the SPIT table.

In summary an aspect of the invention can be seen in that it is the End user, i. the called communication subscriber, allows is an evaluation of a caller communication subscriber to that effect make sure that the respective VoIP call is a SPIT caller. The rating is then used and helps to identify other called party i.e. protect other end users from SPIT.

• a) Absetzen des Spit-Votings durch den Nutzer; dies sollte mit minimalem Aufwand durch den Nutzer erfolgen, um die Akzeptanz dieser Vorgehensweise zu erhöhen.
• b) Speichern der Daten bei dem Kommunikationsdienst-Provider.
• c) Auswerten der Daten zum Verhindern von SPIT.

Technical aspects of the realization, as described above, can be divided into three aspects:

• a) discontinuation of the spit voting by the user; this should be done with minimal effort by the user to increase the acceptance of this approach.
• b) storing the data at the communication service provider.
• c) Evaluate the data to prevent SPIT.

The SPIT information is provided by the operator or the communications service provider, as described above, not end-user related, but unspecific in this regard and stored globally, stored in a table, in other words.

The Table contains additionally to the phone number of the SPIT suspect The number of SPIT votes that call this number as one SPIT communication subscriber estimated to have.

One Table entry is made at the first voting, i. at the first Naming the respective telephone number as a SPIT telephone number for a telephone number created and then counted up with each voting, i.e. elevated, or counted down, i.e. degraded, depending on what kind of frequency assessment the naming of the respective subscriber is used.

The Information as to which end user has submitted the voting will be provided in the table is not saved. There is also no optional distinction whether the same end user has made several SPIT votes, or many different end users have submitted their voting. The save Sender-relevant information is according to these embodiments The invention is not necessary, as it is only about the frequency how many times a caller was rated as a SPIT caller.

It It should be noted that the procedure is also used can be used to maintain participant-specific blacklists.

Of the Operator or communication service provider uses the information a global SPIT probability for certain caller phone numbers to calculate. This is done according to a embodiment of the invention in combination with the analysis of other features of the invention SPIT suspects.

For example may end-user SPIT voting as input to a self-learning system serve for SPIT detection, which any algorithms of artificial Intelligence, for example, artificial neural networks, genetic algorithms, etc. used.

• • Der Endnutzer kann auf einfache Weise einen Anruf als SPIT-Anruf markieren. Wenn hierzu beispielsweise Soft-Tasten, d.h. mittels Software, alternative als mechanische Tasten, implementierter Tasten verwendet werden, so wird nur ein Tastendruck benötigt. Dies erhöht die Akzeptanz der Vorgehensweise durch den Endnutzer.
• • Die SPIT-Markierung ist flexibel, da sie sowohl während des Anrufs als auch unmittelbar danach oder sogar vor Annahme des Anrufs, ausgelöst werden kann.
• • Auch Anrufer mit unterdrückter Rufnummer werden erfasst, da der Kommunikationsdienst-Provider die Information über die Telefonnummer und die Identifikation des die jeweilige Kommunikationsverbindung anfordernden Teilnehmers hat.
• • Der Kommunikationsdienst-Provider hat die Möglichkeit, die SPIT-markierten Rufnummern in einer globalen Liste (Tabelle) auszuwerten und somit Aussagen über die SPIT-Wahrscheinlichkeit bestimmter Rufnummern beziehungsweise bestimmter Kommunikationsteilnehmer anzubieten. Diese Angabe der SPIT-Wahrscheinlichkeit kann als weiterer zusätzlicher Kommunikationsdienst (Value Added Service) angeboten werden.
• • Die globale Liste (Tabelle) ermöglicht die Erfassung von erheblich mehr SPIT-Anrufern als bei teilnehmerspezifischen Listen.
• • Die globale Liste kann durch automatische Algorithmen bereinigt werden, beispielsweise durch Analyse der Häufigkeit der Anrufe eines in der Liste eingetragenen Anrufers.
• • Die Kombination teilnehmerspezifischer Blacklisten zur Ermittlung einer allgemeinen SPIT-Wahrscheinlichkeit entfällt und damit wird eine erhebliche Menge benötigter Rechenzeit eingespart.
• • Der Provider kann darüber hinaus Endnutzer-spezifische Blacklisten als zusätzlichen Dienst anbieten.
• • Der Kommunikationsdienst-Provider kann dem Endnutzer einen Zugang zum Ändern der Blacklisten und gegebenenfalls zum Ändern von so genannten Weißlisten (Whitelist) geben, damit im Nachhinein eventuelle „Falsch-Abstimmungen" (Falsch-Votings) geändert werden können. Dabei ist darauf zu achten, dass bei Rufnummern, die mit Rufnummernunterdrückung benutzt worden sind, nicht die komplette Nummer angezeigt wird.

In summary, some advantages of the SPIT signaling embodiments described above are set forth below:

• • The end user can easily mark a call as a SPIT call. If, for example, soft keys, ie using software, alternative keys than mechanical keys, implemented keys are used, so only one keystroke is needed. This increases the acceptance of the procedure by the end user.
• • The SPIT flag is flexible as it can be triggered both during the call and immediately afterwards, or even before the call is accepted.
• • Callers with a suppressed number are also detected, since the communication service provider has the information about the telephone number and the identification of the subscriber requesting the respective communication connection.
• • The communication service provider has the option of evaluating the SPIT-marked telephone numbers in a global list (table) and thus to provide information about the SPIT probability of certain telephone numbers or specific communication subscribers. This indication of SPIT probability can be offered as another additional value added service.
• • The global list (table) allows for the collection of significantly more SPIT callers than for subscriber-specific lists.
• • The global list can be cleared by automatic algorithms, for example, by analyzing the frequency of calls made by a caller listed in the list.
• • The combination of subscriber-specific blacklists to determine a general SPIT probability is eliminated and thus a considerable amount of computation time required is saved.
• • The provider may also offer end-user specific blacklists as an additional service.
• • The communication service provider may give the end user access to modify the blacklists and, if necessary, to change white lists (whitelists) so that any possible "wrong votes" can be changed afterwards in that numbers that have been used with telephone number suppression do not show the complete number.

Claims (24)

Method for computer-aided building of a table with communication participants about which has been stated to be at least one for at least one other Communication participant undesirable Have requested voice communication connection • where one Message is received, which contains: • an information, by means of which it is stated that a communication link between a caller-communicator and a called-communicator for the Called-communication participant was undesirable, • a caller identification, by means of which the caller communication subscriber is identified, • where the Caller Communication Associate with regard to the called communication subscriber unspecific is entered in a table or, if the caller communication participant already entered in the table, a value with which the frequency the naming of the caller communication subscriber is specified, increased or is lowered. Method according to claim 1, wherein the message is one of the at least one other communication participant sent message is received. Method according to claim 1 or 2, wherein the message is transmitted according to a communication connection control protocol becomes. Method according to claim 3, wherein the message according to the session Initiation Protocol transmitted becomes. Method according to claim 4, wherein the message is a Session Initiation Protocol Notify message becomes. Method according to claim 5, where as the message is a Session Initiation Protocol based message with an additional Message field in which the information is contained, using the is specified that a communication link between a Caller Communication Participant and a Caller Communication Party for the Called Communication Participant undesirable was, transmitted becomes. Method according to claim 5 or 6, the information indicating that a communication connection between a caller communication subscriber and a called party for the Called communication participants undesirable was in the header of the message is transmitted. Method according to one of claims 1 to 7, wherein in the message a code entered into the communication device of the called communication party is transmitted of which the recipient of the message is informed that a communication connection between a caller communication subscriber and a called communication subscriber for the called communication subscriber was undesirable. Method according to one the claims 1 to 8, wherein messages from different communication participants received, each message containing: • an information, by means of which it is stated that a communication link between a caller-communicator and a called-communicator for the Called communication participants was undesirable, • a caller identification, by means of which the caller communication subscriber is identified. Method for computer-aided determination at least a communication subscriber who is believed to be he at least one for at least another communication subscriber unwanted voice communication connection has requested • in which for at least one in a table, in the communication party, the caller at a communication connection between a caller communication subscriber and a called party were, which for the Called-Communicator was undesirable with regard to Called communication participant unspecifically registered, registered communication participant is checked, whether this meets a predefinable criterion, • in the event that the registered Communication participant meets the predetermined criterion, the Communication participant accepted as a communication participant who is at least one for at least one other communication subscriber unwanted voice communication connection has requested. Method according to claim 10, wherein at least one additional Criterion is used to determine if it is a communication participant is a communication participant who has at least one for at least another communication subscriber unwanted voice communication connection has requested. Method according to claim 11 using at least one of the following additional criteria becomes: • Duration one or more communication links in which a respective one Communication participant was the caller communication participant, • Information about the Behavior of the communication participant as caller communication participant, • Information about the Behavior of the caller communication subscriber across from one or more communication service providers. Method according to one the claims 1 to 12, wherein as a voice communication connection a packet-switched Voice communication connection or a circuit-switched voice communication connection is used. Method according to one the claims 1 to 13, wherein as a voice communication connection an Internet-based Voice communication connection is used. Method according to claim 14, wherein as voice communication connection a voice over Internet Protocol voice communication connection is used. Method according to one the claims 1 to 15, performed from a computer of a communications service provider. Device for constructing a table with communication participants, via which has been stated to be at least one for at least one other Communication participant undesirable Voice communication link have requested • With a receiver for receiving a message containing: • an information, by means of which it is stated that a communication link between a caller-communicator and a called-communicator for the Called-communication participant was undesirable, • a caller identification, by means of which the caller communication subscriber is identified, • with a Table management unit, which is set up such that she the caller-communicator unspecified with respect to the called party enters in a table or if the caller communicator already entered in the table, a value with which the frequency the name of the caller communication subscriber is specified, elevated or humiliated. Device for determining at least one communication subscriber who is assumed to have requested at least one voice communication connection undesirable for at least one other communication user, with a test unit which is set up for testing for at least one in a table in which communication parties who were callers in a communication connection between a caller communication subscriber and a called communication subscriber who was undesirable for the called communication subscriber are nonspecifically registered with respect to the called communication subscriber, registered communication participant this satisfies a predefinable criterion, • with a determination unit which is set up in such a way that if the registered communication user satisfies the specifiable criterion, he / she determines the communication participant as the communication participant who requests at least one voice-communication connection unwanted for at least one other communication participant Has. Computer program element for building a table with communication participants about which has been stated to be at least one for at least one other Communication participant undesirable Voice communication link have requested that, when executed by a computer, having: • one Message is received, which contains. • an information, by means of which it is stated that a communication link between a caller-communicator and a called-communicator for the Called-communication participant was undesirable, • a caller identification, by means of which the caller communication subscriber is identified, • the caller communication subscriber becomes unspecific with respect to the called party entered in a table or, if the caller communication subscriber already entered in the table, becomes a value with which the frequency the naming of the caller communication subscriber is increased. Computer program element for computer-aided determination at least one communication subscriber for whom it is assumed that he at least one for at least one other communication subscriber unwanted voice communication connection which, when executed by a computer, has having: • for at least one in a table, in the communication party, the caller at a communication connection between a caller communication subscriber and a called party were, which for the caller-communicator was undesirable with regard to the Called communication participant are registered unspecifically, registered communication participants will check if this meets a predetermined criterion, • in the case, that the registered communication subscriber the predetermined criterion is enough, will the communication participant is assumed to be a communication participant, the at least one for at least one other communication subscriber unwanted voice communication connection has requested. Method of signaling that a communication connection for one Called communication participants undesirable was • in which a code is entered from the called-up communication subscriber into a communication device becomes, by means of which the receiver the message is given that a communication connection between a caller communication party and the called communication party for the Called communication participants undesirable was • in which a message is generated containing the code and a caller identification, by means of which the caller communication subscriber identifies is, contains, • where the Message is sent to an evaluation unit. Method according to claim 21, wherein the message to an evaluation unit by means of a telecommunications network is sent. Communication device, • with an input unit for Entering a code by which the recipient of the message specified is that a communication link between a caller communication subscriber and the called party for the called party undesirable was • With a message generation unit for generating a message, the code and a caller identification, by means of which the caller communication subscriber is identified contains, • with a Transmitter for sending the message to an evaluation unit. A computer program element for signaling that a communication connection was undesirable to a called communication subscriber who, when executed by a computer, has: • a code is inputted from the called communication user into a communication device by which the recipient of the message is indicated; that a communication link between a caller communication subscriber and the called communication subscriber for the called party communication a message was generated which contains the code and a caller identification by means of which the caller communication subscriber is identified, the message is sent to an evaluation unit.